--- @class Effect
--- @field tag string
local effect = {}
effect.__index = effect

--- @param owner Character
function effect:onBirth(owner)
end

--- @param owner Character
function effect:onDeath(owner) end

--- @param owner Character
function effect:onStartTurn(owner) end

--- @param owner Character
function effect:onEndTurn(owner) end

--- @param other Effect
--- @return Effect|nil
function effect:sum(other) end

function effect:update(dt) end

function effect:draw() end

--- @param data {tag: string, onBirth: fun(owner: Character)?, onDeath: fun(owner: Character)?, onStartTurn: fun(owner: Character)?, onEndTurn: fun(owner: Character)?, sum: fun(owner: Character)?}
--- @return Effect
local function new(data)
    return setmetatable({
        tag = data.tag,
        onBirth = data.onBirth,
        onDeath = data.onDeath,
        onStartTurn = data.onStartTurn,
        onEndTurn = data.onEndTurn,
        sum = data.sum
    }, effect)
end

return { new = new }